Receptacle



G. ORSTRCM Feb. 16, 1937.

RECEPTACLE Filed Jan. 26, 1934 2 Sheets-Sheet 1 G. CRSTROM Feb. 16,1937.

RECEPTACLE Filed Jan. 26, 1934 2 Sheets-Sheet 2 Patented Feb. 16, 1937UNITED STATES PATENT OFFICE RECEPTACLE Sweden Application January 26,1934, Serial No. 768,481

In Sweden February 2, recs Claims.

This invention relates to an improved receptacle and method ofmanufacturing same.

One object of my invention is to provide a receptacle particularly apaper receptacle for liquid 5 which is particularly inexpensive inconstruction yet strong, tight and durable.

Another object of my invention is to provide a receptacle of theindicated character to the end that the receptacle will be reinforcedand hermetically sealed at the bottom which will be very smooth.

A further object of my invention is to provide a receptacle being madeof a rectangular folded blank to the end of obtaining an hermeticallyable to withstand-for instance, the shocks ordinarily received by aliquid bottle as well as internal liquid pressure.

Still a further object of my invention is to provide an inexpensiveprismatic receptacle being particularly well adapted for storage andhaving an hermetically sealed bottom which is very resistant againstshocks or the like.

Still a further object of my invention is the provision of aninexpensive rounded receptacle and method for making same to the end ofmanufacturing rounded receptacles of a single paper blank which have ahermetically sealed bottom which is very strong and durable and permitsthe receptacle to stand steady upon surfaces of practically any kind.

Still a further object of my invention is the provision of a receptacleand method of making same which possesses advantages in points ofsimplicity and eificiency, and, at the same time proves itselfcomparatively inexpensive in cost of manufacture.

In the accompanying drawings forming part of this specification andwherein similar reference characters refer to similar parts throughoutthe several views,

Fig. 1 is a perspective view of the partly sealed bottom of thereceptacle;

Fig. 2 is a perspective view of the sealed and finished bottom of thereceptacle;

Fig. 3 is an elevational section of the bottom end of the receptacle;

Fig. 4 illustrates a modified form of the partly sealed bottom of thereceptacle;

Fig. 5 illustrates said modified form completely sealed and treated;

Fig. 6 is an elevational section of another modified form of thereceptacle; and

Fig. '7 is a perspective view of the bottom of another embodiment of thereceptacle folded in sealed bottom which is strong and durable andthesame manner as illustrated in Fig. 1 and 2.

It is the purpose of my present invention to provide a receptacle whichis sealed by folding with an impressed bottom to the end of utilizingthe well known matter of fact that receptacles produced by foldingblanks are comparatively inexpensive in manufacture and therebyobtaining a receptacle having the advantages as to strength andtightness of receptacles of the more expensive kind which are producedby molding, and in ad-' dition obtaining a method of extensivemanufacturingof inexpensive receptacles.

In carrying out the aim of my invention I employ a tubular blank or arectangular blank of paper or similar material and fold same so that asealed bottom is obtained, whereafter said bottom is impressed so thatreinforcing zones are obtained at the junctures between the body of thereceptacle and edges of flaps that are obtained on the sealing of saidbottom end. In the descriptlon hereinafter it is supposed that a paperblank is employed for the purpose referred .to. In the embodimentillustrated in Fig. 1-3 the bottom of the receptacle is sealed byfolding primarily the rectangular paper blank I to constitute arectangular body one end of which is sealed by primarily folding theends of two opposite side walls into overlapping relation as shown inFig. 1 and folding side flaps 3 thereby obtained into superposedrelation, as shown in Figs. 2 and 3. Then the bottom is subjected to apressing action so that it is formed with a reinforcing zone llextending not only over the corners of the receptacle but all around thebottom leaving a channel 6 between said reinforce and the body of thereceptacle. Thus a reinforcing bulb 5 is formed at the bottom of thereceptacle, extending beyond the longitudinal seam obtained on primarilyfolding the rectangular blank as well as beyond the corners of thereceptacle. Though 40 part of the reinforcing and tightening zonesextending from one corner to another may be omitted they will provide anadditional stiffening of the bottom of the receptacle and counteract theinterior pressure of liquid, etc. supplied to the receptacle. For thepurpose of obtaining a particularly tight receptacle bottom it may beconvenient to impregnate the inside of the receptacle with wax or anysimilar tightening substance. Then the channels 6 are filled partly orentirely with wax as shown in Fig. 3.

It may under circumstances be convenient to perform the folding of theblank in a manner indicated in Figs. 4 and 5, thereby dispensing withthe seams 8 and I shown in Fig. 1. Such folding is executed in a mannerwell known in the art and therefore but a brief description thereof maybe necessary herein. A rectangular blank or strip is folded about theend of a rectangular mandrel so that said end supports the undividedbottom 9 of the receptacle to be formed. Then the edges IQ of twoopposite ends I i of the blank are folded into superposed relation asillustrated in Fig. 4 so that two opposite flaps i2 are obtainedconstituting extensions of the parts i0. n proceeding with the knownfolding operation said flaps are, in order to prevent leakage, foldedupon the side parts l0 into a position indicated in dash and dottedlines in Fig. 4. Such a sealing will not ensure complete tightening asliquid will have a tendency of escaping through the seam at l3. Besidesa receptacle folded in such manner will not have an attractiveappearance, and part of the seam at I3 may accidentally be torn-off.

If however according to this invention the bottom of the receptacle ispressed-inwards the flaps l2 may be folded about the bottom 9 into theposition shown in Fig. 5 as the subsequent pressing operation willcompletely ensure tightness and obviously possible irregularities of thesurface of the bottom will then be unimportant, the more that suchirregularities are in part removed by the pressing action. Even in thiscase channels 6 may be obtained between the reinforcing zones and thebody of the receptacle and such channels may be filled with wax, and itis obvious that a receptacle filled with liquid or heavy pulve'rulentmaterial which has a tendency of bulging the bottom will rest moresteady upon a surface if it is provided with the bulbs 5 than if itsbottom rests directly on said surface.

Thou'gh as mentioned the reinforcing bulbs will remove the disadvantageof the bulging of the bottom of the receptacle it may undercircumstances, especially if particularly heavy liquids are to becontained by the receptacle for a comparatively long time, be convenientto still more reinforce the bottom of the receptacle. For such purpose apiece of pasteboard or the like i4, Fig. 6 may be applied to the bottompreferably prior to folding the flaps 3 thereabout. In addition such apiece will facilitate thepressing subsequently executed.

The tubular part of the receptacle illustrated in Fig. 2 can be pressedso that its bottom end obtains a rounded cross-sectional shape, as shownin Fig. 7. The projections l5 thereby obtained correspond to the cornersof a rectangular receptacle. This embodiment will render a particularlysteady resting of the receptacle on uneven surfaces.

I claim:

1. A receptacle having a tubular body and a bottom end which is sealedby folded end portions of the tubular body comprising flaps havingfolded edges, and a plurality of projections each cons ituting anextension of said tubular body at the juncture between one of said edgesand said tubular body leaving depressions between said edges.

2. A receptacle having a tubular body formed of a plurality of flat sidewalls, and a bottom end which is sealed by folded end portions of saidwalls comprising flaps having folded edges which extend from corners ofthe receptacle, and a plurality'of projections each constituting anextension of said tubular body at one of said corners leavingdepressions between said corners.

3. A receptacle having a tubular body and a bottom end which is sealedby folded end portions of the tubular body comprising flaps havingfolded edges, and a pluralityof projections each constituting anextension of said tubular body at the juncture between one of said edgesand said tubular body leaving depressions between said edges, saidprojections comprising upturned reinforcing zones within said' tubularbody.

4. A receptacle having a tubular body and a bottom end which is sealedby folded end portions of the tubular: body comprising flaps havingfolded edges, and a plurality of projections each constituting anextension of said tubular body at the juncture between one ofsaid'eriges and said tubular body leaving depressions between saidedges, said projections constituting channels within the receptacle.

5. A receptacle having a tubular body the bottom end of which has arounded cross-sectional shape and is sealed by folded end portions ofthe. tubular body, comprising flaps having

